West Coast Endocrine, Inc. in Long Beach, CA
a leader in the field of Diabetes treatment.

West Coast Endocrine provides the best possible care and education for patients with thyroid, diabetes, and weight management issues.

Endocrinology is a complex study of the various hormones and their actions and disorders in the body. Glands are organs that make hormones. These are substances that help to control activities in the body and have several effects on the metabolism, reproduction, food absorption and utilization, growth and development. An informed patient is one who takes an active role in their health and diet.


Dr. Jennifer L. Hsieh, D.O., F.A.C.E., C.D.E.

562-988-0040 | email

Dr. Hsieh was born in Taipei, Taiwan and raised in Southern California beginning at a very young age. She spent most of her childhood in the suburbs of Long Beach. After graduating from Lakewood High School, she attended the University of California at Irvine. After graduating with a Bachelor of Science in Biology and a Bachelor of Arts in Psychology, she went on to complete her postgraduate studies in medicine at Western University of Health Sciences in Pomona.

She graduated and earned her Doctor of Osteopathic Medicine degree in 1995. Not venturing too far, she then completed her internship and residency in internal medicine at Huntington Memorial Hospital in Pasadena. She then decided to further her postgraduate training in the sub-specialty of Endocrinology.

Dr. Hsieh has always had an interest in diabetes since her undergraduate years where she spent 3 years focusing on islet cell transplantation research. After completing 2 years of fellowship training in Endocrinology, Diabetes, and Metabolism at Scripps Clinic in La Jolla, she returns to her hometown, Long Beach to begin her practice of medicine.

Dr. Hsieh is board certified in internal medicine, endocrinology, diabetes, and metabolism, and a fellow of the American College of Endocrinology. Dr. Hsieh thrives on direct patient care and spending time educating her patients about their disease process. She is also actively involved in clinical research as a principal investigator. She has also received an additional board certification in the specialty of Obesity Medicine from the American Board of Obesity Medicine (ABOM).

Dr. Hsieh is an Assistant Professor of Clinical Endocrinology at Western University of Health Sciences and is a preceptor for medical students. She is also the Medical Director of the Adult Diabetes Program at Long Beach Memorial Medical Center.


Ellie Moritake, PA-C, CDE

562-988-0040 | email

Ellie is a board certified Physician Assistant and an affiliated member of both the California Academy of Physician Assistants (CAPA) and the American Academy of Physician Assistants (AAPA). She received her Masters in Physician Assistant Studies from Western University of Health Sciences in Pomona, California. Before joining West Coast Endocrine, Ellie had experience in both endocrinology and sleep medicine. She is a devoted and compassionate professional who prides herself in providing the time and attention needed for each individual patient. Education is an area in which she works to instill in her patients, since she instructs each patient about diabetes, its complications, and proper diet. "When someone is newly diagnosed with diabetes, he/she is experiencing an array of emotions and must have various questions running through his/her head. I am there to answer their questions and give them hope that he/she can live a long and healthy life with proper lifestyle modifications and treatment."

Ellie is also a certified insulin pump trainer, and can train patients on the continuous glucose monitoring system (CGMS). In fact, she was one of the first people to try the CGMS system when it was FDA approved. Her patience and understanding makes the patient comfortable with inserting an infusion or sensor site for the first time.


Sylvia Hernandez, RD, CDE

562-988-0040 | email

Sylvia is a Long Beach native with an interest in nutrition stemming from elementary school. "My sixth grade science experiment involved carbohydrate comparisons between various foods. I don't know if my classmates were particularly excited about it, but I sure was!" She pursued her nutrition degree at California State University, Los Angeles. She is a Certified Diabetes Educator and has a board certification specialty in diabetes. She holds membership with the Academy of Certified Diabetes Educators.

Throughout her years of practice, her best moments are "seeing the light bulb" go off. "It's a state of contentment for me when clients truly understand how nutrition impacts their health. Knowledge is one thing, but if you add doses of support and encouragement, they will do well." Mrs. Hernandez' experience in dealing with weight management issues of various degrees is extensive. "There are a number of social, emotional and behavioral aspects that need to be considered. The approach for helping someone lose weight may differ from person to person." Although her experience as a dietitian includes working in various hospital settings, consulting in a private practice, and lecturing for various programs, the message remains the same. "Long term behavior change is the goal... I'd like to help people in their journey to attain that."


Michelle Tungate

562-988-0040 | email

Office Manager and Clinical Laboratory Manager


Erika Barrera

562-988-0040 | email

Medical Assistant


Germani Ivie

562-988-0040 | email

Medical Assistant

Make an Appointment | Call: 562-988-0040 or use our Contact Form

  • American Board of Internal Medicine
  • American Board of Obesity Medicine
  • endocrine society
  • American Association of Clinical Endocrinologists
  • american diabetes association